<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area">
				<div class="title border-topbottom">当前城市</div>
				<div class="button-list">
					<div class="button-wrapper"><div class="button">{{this.currentCity}}</div></div>
				</div>
			</div>
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
				<div class="button-list">
					<div 
					  class="button-wrapper" 
					  v-for="item of hot" 
					  :key="item.id"
					  @click="handleCityClick(item.name)"
					>
					  <div class="button">
					  	{{item.name}}
					  </div>
					</div>
				</div>
			</div>
			<div 
			  class="area" 
			  v-for="(item,key) of cities" 
			  :key="key"
			  :ref="key"
			>
				<div class="title border-topbottom">{{key}}</div>
				<div class="item-list">
					<div 
						class="item border-bottom"
						v-for="innerItem of item"
						:key="innerItem.id"
						@click="handleCityClick(innerItem.name)"
					>
						{{innerItem.name}}
					</div>
				</div>
			</div>
		</div>
	</div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState,mapMutations } from 'vuex'
export default {
	name: 'CityList',
	props: {
		hot: Array,
		cities: Object,
		letter: String
	},
	computed: {
		...mapState({
			currentCity: 'city'
		})
	},
	methods: {
		handleCityClick (city) {
			this.changeCity(city)
			this.$router.push('/')
		},
		...mapMutations(['changeCity'])
	},
	mounted () {
		this.scroll = new Bscroll(this.$refs.wrapper)
	},
	watch: {
		letter() {
			if(this.letter){
				const element = this.$refs[this.letter][0]
				this.scroll.scrollToElement(element)
			}
		}
	}
}
</script>

<style lang="stylus" scoped>
	@import '~styles/varibles.styl'
	.border-topbottom:before
	      border-color: #ccc
	.border-topbottom:after
	      border-color: #ccc
	.border-bottom:before
	      border-color: #ccc
	.list
		overflow: hidden
		position: absolute
		top: 1.58rem
		left: 0
		right: 0
		bottom: 0
		.title
			line-height: .54rem
			background:#eee
			padding-left: .2rem
			color: #666
			font-size: .26rem
		.button-list
			overflow:hidden
			padding: .1rem .6rem .1rem .1rem
			.button-wrapper
				width:33.33%
				float:left
				.button
					padding: .1rem 0
					text-align: center
					margin: .1rem
					border: .02rem solid #ccc
					border-radius: .06rem
		.item-list
			.item
				line-height: .76rem
				padding-left: .2rem
</style>